Need software suggestion - Please

Hi

Can anyone suggest free, or almost free, software for making a sketch similar to the one below? I copied this one from the mini dsp site.
I would like to convert my three way to active three way with dsp crossover. Making a sketch like shown below will help me.
Dan
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Pages on the Mac, but probably a bit awkward with the graphics. I have at least 3 pieces of that would easily do this but none are even close to near free.

I am exploring this (multiPlatform) one may do it, the interface is, without the manual, somewhat daunting, and it is more designed to generate 3D solids from the 2D drawings. Don’t know how it works with bitmaps.

dave
 
For self-sketching? Not for informing or impressing others?

MS Paint is adequate. I've used Paint-7 about twice in a decade and managed to knock this up in a few minutes. You can paste actual images to make things prettier.
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Thank you to everyone. I love this forum. I used diagrams.net to make the sketch below. Could not have done it without your help. Lots of good suggestions. Forgot about paint.

Now for the hard part. Looking for DSP that has the needed inputs and outputs and price.

When asking for help finding the DSP, is there a suggestion as to what forum to use. Thinking about it, this is not a DIY project so I should move to a different board. Any ideas?

Dan


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